21424+4105 KUI 108 AB
21h 42m 22.94s +41° 04' 37.3" P.A. 14.00 sep 0.2 mag 6.33,6.72 Sp A0V dist. 126.42 pc (412.38 l.y.)
Coord 2000 |
21424+4105 |
|
Discov num |
KUI 108 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 42 22.94 +41 04 37.3 |
|
Date first |
1937 |
|
Date last |
2014 |
|
Obs |
143 |
|
Pa first |
4 |
|
Pa last |
13.6 |
|
P.A. Now (θ) |
302.7° |
|
Sep first |
0.2 |
|
Sep last |
0.203 |
|
Sep. Now (ρ) |
0.119" |
|
Mag pri |
6.33 |
|
Mag sec |
6.72 |
|
delta mag (ΔM) |
0.39 |
|
Spectral class |
A0V (white) |
|
Pri motion ra |
+031 |
|
Sec motion ra |
|
|
Pri motion dec |
-005 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21424+4105 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
51207 |
21 42 23 +41 04 37 |
KUI 108 AB |
2014 |
143 |
14 |
0.2 |
6.33 |
6.72 |
0.39 |
Y |
<=== |
Show |
HD 206644 |
51207 |
21 42 23 +41 04 37 |
ARY 129 AB,C |
2017 |
1 |
132 |
145.5 |
6.30 |
7.80 |
1.50 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cygnus |
|
SAO |
51207 |
|
HIP |
107162 |
|
Tycho2 |
3188-01949-1 |
|
HD |
206644 |
|
HR |
8300 |
|
GC |
30394 |
|
BD |
BD+40 4615 |
|
Flamsteed |
77 Cygni |
|
Flamsteed name |
77 Cyg |
|
Distance |
126.42 |
|
Distance ly |
412.38 |
|
SUSPECTED ORBITAL ELEMENTS
Identifier | 21424+4105 KUI 108 |
coord_arcsec_2000 | 214222.94+410437.3 |
Period (P) | 26.49y | |
Periastron (T) | 1974.72y | |
Semi-major axis (a) | 0.153a | |
Eccentricity (e) | 0.333 | |
Inclination (i) | 142.4° | |
Longitude of periastron (ω) | 176.1° | |
Node (Ω) | 12.3° | |
Notes | n | |
Reference | Hrt2000c | |
Equinox | 2000 | |
Last observation | 1997 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
223.8 |
0.099 |
2001 |
200.2 |
0.102 |
2002 |
177.4 |
0.102 |
2003 |
154.3 |
0.101 |
2004 |
130.8 |
0.101 |
2005 |
108.8 |
0.107 |
2006 |
89.9 |
0.118 |
2007 |
74.6 |
0.132 |
2008 |
62.4 |
0.147 |
2009 |
52.3 |
0.161 |
2010 |
43.9 |
0.174 |
2011 |
36.6 |
0.185 |
2012 |
30.0 |
0.194 |
2013 |
23.8 |
0.200 |
2014 |
18.0 |
0.203 |
2015 |
12.3 |
0.204 |
2016 |
6.5 |
0.201 |
2017 |
0.5 |
0.196 |
2018 |
354.1 |
0.188 |
2019 |
347.0 |
0.178 |
2020 |
338.9 |
0.165 |
2021 |
329.4 |
0.150 |
2022 |
317.6 |
0.134 |
2023 |
302.7 |
0.119 |
2024 |
283.7 |
0.106 |
2025 |
260.8 |
0.099 |
2026 |
235.9 |
0.098 |
2027 |
211.6 |
0.100 |
2028 |
188.6 |
0.102 |
2029 |
165.7 |
0.101 |
2030 |
142.3 |
0.101 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|